/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.linkis.common.utils

import org.apache.linkis.common.conf.Configuration

import org.apache.commons.io.FileUtils

import java.io.File
import java.util.concurrent.TimeUnit

object RefreshUtils {

  def registerFileRefresh(
      period: Long,
      file: String,
      deal: java.util.List[String] => Unit
  ): Unit = {
    Utils.defaultScheduler.scheduleAtFixedRate(
      new Runnable {
        val f = new File(file)
        var fileModifiedTime = if (f.exists()) f.lastModified() else 0
        override def run(): Unit = {
          if (!f.exists()) return
          if (f.lastModified() > fileModifiedTime) {
            deal(FileUtils.readLines(f, Configuration.BDP_ENCODING.getValue))
            fileModifiedTime = f.lastModified()
          }
        }
      },
      period,
      period,
      TimeUnit.MILLISECONDS
    )
  }

}

abstract class Deal {
  def deal(line: String): Unit
}
